Charles seybold



(No Model.)

G. SEYBOLD.

CLAMP COUPLING DEVICE FOR PAPER GUTTERS.

No. 597,069. Patented Jan. 11, 1898.

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UNITED STATES PATENT Orricn,

CHARLES SEYBOLD, OF DAYTON, OHIO, ASSIGNOR TO THE SEYBOLD MACHINE COMPANY, OF SAME PLACE.

CLAM P-COUPLING DEVICE FOR PAPER -C UTTERS.

SPECIFICATION forming part of Letters Patent No. 597,069, dated January 11, 1898.

Application filed February 12, 1897. Serial No. 623,114. (No model.)

To all whom it may concern:

Be it known that I, CHARLES SEYBOLD, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Clamp-'Oouplin g Devices for Automatic Paper-Cutters, of which the following is a full, clear, and exact description,reference being had to the accompanying drawings, forming part of this specification.

My improvements relate to devices for coupling the clamp to the driving mechanism in an automatic paper-cutter in that class of mawhile the clamp stops on the paper.

chines in which the driving mechanisms for the clamp and for the knife are connected by a friction-clutch and in which the knife-driving power is exerted on the clamp within the limits of the clutch to hold rigid the paper, but to allow the knife to continue its operation by the slipping of the friction-clutch,

In machines of this class when the clamp is connected directly to the driving mechanism it is evident that the clamp-pressure will be dependent entirely'on the friction-clutch. Now for very tough papers, in which great power must be expended to drive the cutting-knife through the paper, the friction-clutch may be loaded to its extreme limit and still the clamppressure will not be sufficient to hold the paper. It is the purpose of my invention to overcome this difficulty and to provide means whereby the clamp-pressure maybe doubled 'without increasing the weight or power of such machines by the means to be hereinafter particularly pointed out and claimed, in which the clamp-pulling bars are not connected directly to the clamp, but to a lever fulcrumed on a sliding plate, to which lever the clamp is also secured and in which the construction is such that the moment the clamp begins to compress the paper the sliding plate becomes locked to the frame, thus fixin g the fulcrum and compounding the compression-power of the c1amp-pulling bars,

In the drawings, Figure l is a side elevation of a portion of a paper-cutting machine with my device attached, showing the position of parts when the clamp is not on the paper. Fig. 2 is a similar View with the clamp compressing the paper. Fig. 3 is a detailed front view of the pair of catches for the sliding plate.

A is a portion of the frame of one side of a paper-cutter. the clamp-drivin g shaft, connected with the clamp-pulling bars D by crank E. F is one end of the knife-bar, and G one of the connecting-rods for the knife-bar to the knifedriving plate, one end of which is shown in dotted lines at H. K is an expansion-band friction-clutch (shown in dotted lines) mounted on the clamp-shaft O and connected with the knife-driving bar H, so that when the bar II is driven by gearing and power-shaft (not shown) the clamp-shaft C will be oscillated. I have not illustrated these parts in detail, as they form no part of my present invention, and they may be constructed in any of the Well-known ways-such, for example, as in my prior patent, No. 511,972, of January 2, 1894.

In illustrating the novel features of my present invention I have shown but one side of the machine. It will be understood, however, that these clamp-coupling parts are all in duplicate, so that the description of one set of parts will apply to the other set on the other side of the machine.

Heretofore, as I have already stated, the clamp-pulling bars D0ne pair on each sidehave been directly connected with the clamp, 50 that the power employed to rotate the shaft 0 has been used directly in pulling down the clamp onto the paper, and under certain conditions sufficient clamp-pressure cannot be thus obtained. Instead, therefore, of coupling the pulling-bars D directly to the clamp I couple same by pin a to the outer end of lever L. The other end of the lever is pivoted by pin 0- to the lower end of a movable piece or sliding plate M, which is arranged to slide vertically in a recess in the top piece N of the frame of the machine and is guided therein by the flange b. The clamp B is also connected to the lever L by the stud d. Bolted or otherwise secured to the outer end of the lever L is a dog or bar P, the upper end of which engages a notch e in the sliding plate M.

R is a rod pivoted to the sliding plate and passing through an opening in the dog P, and S is a coiled spring bearing between the dog B is one end of the clamp; O,

P and the nut f on the outer end of the rod R, the nut being adjustable on the rod to vary the tension of the coiled spring.

Located in suitable cylindrical recesses in the top piece N of the frame are a pair of serrated or toothed plates T T, supported by studs Z, carrying coiled springs g and held in place by the cotter-pins h. The horizontal teeth on cut in the inner surface of these plates T T are similar to but cut in the opposite direction from the horizontal teeth n in the sliding plate M, and the two plates T are so set that the edges of the teeth will be out of register, while the plate M is wide enough to catch either set of teeth in the plates T T. The purpose of this is that when the sliding plate M, which is normally out of contact with these plates T T, is swung into engagement therewith, as hereinafter described, the plate M will at once engage the teeth in one of these plates T, and the plate T thus engaged, should the teeth not lock exactly, will give a little under the pressure of its coiled spring g to allow an immediate and perfect locking of the sliding plate M thereto, and when thus locked the downward strain on the plate M will be between the interlocked teeth and not on the studs Z.

As already stated, when the clamp is off the paper during the upstroke and during the downstroke until the clamp reaches the paper the dog P, under pressure of the spring S, will hold the plate M out of engagement of the plates T, and the clamp by its own weight will follow down with the pulling-bars. The moment, however, the clamp reaches the paper and stops the pull of the barsD on the lever L will at once begin to rotate the lever. This will withdraw the dog P from the sliding plate and the action of the coiled spring S on the head of the rod R will swing the plate M into engagement with one of the plates T, and the plate M will at once become locked through the plate T to the frame of the machine, and, as already described, there will be no downward slip of the plate M, because no matter in what position the corresponding teeth may meet if the teeth do not happen to catch in exact locking position the proper plate T will give the amount required to bring the teeth of M into exact locking position. It will thus be seen that the coiled spring S serves two functions. hen there is no strain on leverL and its dog P, the dog acts on the sliding plate to free it from the lock, and as soon as pressure is brought to bear on the lever the coiled spring then acts on the rod R and sliding plate to lock it to the frame. Now the moment the plate M becomes locked to the frame the pivotal point cof the lever L thereon at once becomes a fixed point. The fulcrum of the lever and the pressure on the clamp B, attached to the lever by stud d, is compounded in proportion to the respective distances of stud d and pin a from the fulcrum c. In the construction illustrated these distances are as one to two,

so that a pulling strain of, say, five tons will exert ten tons clamp -pressure. Therefore with my improvements the clamp will inva- 7 riably hold rigid anything that the power of the machine will enable the knife to cut. 111- as much as the distance from the stud d to the fulcrum c is only about one-fifteenth of the distance of the fulcrum c from the point at which the plate M becomes locked to the frame the lever L will operate, as described, without providing any loose connection or means for play between the stud d or pin and the lever L. The stud cl describes such a very small arc of a circle that the movement is not noticeable on the tooth connection or the plate M with the frame, and there is sufficient spring in the parts to permit the movement to take place.

As already stated, it will be understood that all the various parts of the clamp-coupling devices as illustrated for one side of the machine are duplicated for the other side, so that the strain and pressure shall be uniform throughout.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

1. In a clamp-coupling device for paper-cutters, the combination, with the clamp and driving mechanism therefor, of a movable piece normally free when the clamp is not in operation, lever carried by said movable piece to which lever the clamp and its driving mechanism are attached, and means for locking the movable piece to the frame the moment the clamp reaches the paper, whereby afixed fulcrum is formed for the .lever to increase the clamp-driving power, substantially as shown and described.

2. In a clamp-couplin g device for paper-cutters, the combination, with the clamp and drivingmechanism therefor, of a sliding plate free to move when the clamp is not in opera tion, lever carried by said plate to which lever the clamp and its driving mechanism are attached, and means for locking the sliding plate to the frame the moment the clamp reaches the paper, whereby a fixed fulcrum is formed for the lever to increase the clampdriving power, substantially as shown and described.

3. In a clam p-coupling device for paper-cutters, the combination, with the clamp and driving mechanism therefor, of a sliding plate free to move when the clamp is not in operation, lever carried by said plate, to which lever the clamp and its driving mechanism are attached, catch on the frame, and device connected with said lever, acting on said plate to lock same to the catch the moment the clamp reaches the paper, substantially as shown and described.

4. In a clamp-couplin g device for paper-cutters, the combination, with the clamp and driving mechanism therefor, of a sliding plate free to move when the clamp is not in operation, lever carried by said plate to which lever the clamp and its driving mechanism are attached, catch on the frame, dog or bar connected with said lever acting on said sliding plate, with spring acting between said bar and sliding plate to hold said sliding plate free from said catch until the clamp comes into operation and thereupon to lock said plate to the catch, substantially as shown and described.

5. In a clamp-coupling device for paper-cut,- ters, the combination, with the clamp and driving mechanism therefor, of a sliding plate free to move when the clamp is not in operation, lever carried by said plate, to which lever the clamp and its driving mechanism are attached, catch on the frame, dog or bar secured to said lever, rod pivoted to the sliding plate, with spring acting between said bar and rod, whereby while the lever is in operation, the sliding plate will be kept free from its catch and whereby the initial movement of the lever will cause the bar secured thereto to compress the spring and swing said plate into engagement with the catch on the frame, substantially as shown and described.

6. In a clamp-coupling device for paper-cnttore, the combination, with the clamp and driving mechanism therefo r, of a serrated sliding plate, lever carried by said plate to which the clamp and its driving mechanism are attached with spring pressed movable plate mounted in the frame, provided with teeth to be engaged by the teeth of the sliding plate, and means for swinging said plate into engagement with said serrated plate, whereby same may be pressed back to insure a perfect lock of the two plates, substantially as shown and described.

7. In a clamp-coupling device for paper-cutters, the combination, with the clamp and driving mechanism theref0r,of a serrated sliding plate, lever carried by said plate to which the clamp and its driving mechanism are attached, with a pair of spring-pressed movable plates mounted in the frame, provided with teeth out of register with each other, arranged to be engaged indiscriminately by the teeth of the sliding plate, and means for swinging said plate into engagement with either of said pair of serrated plates, whereby the proper one may be pressed back to insure a perfect lock of the parts, substantially as shown and described.

CHARLES SEYBOLD.

Vitnesses:

WEBSTER W. SHUEY, J. ELLIOT PEIRCE.' 

